SNVU856 November   2023 LMR36500

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Additional Images
    2. 2.2 Power Requirements
    3. 2.3 Setup
  7. 3Implementation Results
    1. 3.1 Evaluation Setup
    2. 3.2 Performance Data and Results
  8. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  9. 5Additional Information
    1. 5.1 Trademarks

2.3 Setup

This section describes the connectors and the test points on the EVM and how to properly connect, set up, and use the LMR36500EVM See Figure 3-3 for location of connectors and jumpers and typical setup.

    VOUT Output voltage of the converter VOUT terminal post. Apply load to this connector. The VOUT test point is used to monitor output voltage. The default output voltage can be changed by using the device in the ADJ mode. To initiate the ADJ mode, supply resistors RFBB (R10) and RFBT (R9) to the EVM. See the LMR36500 data sheet for proper selection of these resistors. In ADJ mode, a Bode plot can be taken by using a 10 Ω to 50 Ω resistor in place of Rinj (R8). This resistor becomes the injection point for the frequency response analyzer, allowing the loop frequency response to be taken in the usual way.
    GND Ground of the converter GND terminal post. Apply load ground to this connector. The GND test point is used as ground sense.
    VIN_EMI Input voltage to the converter VIN terminal post. Apply input voltage to this connector. The VIN test point is used to monitor input voltage.
    GND_EMI Input ground of converter. Input GND terminal post. Apply input ground to this connector. The GND test point is used as ground sense.
    Input Filter EMI mitigation An input EMI filter is provided on the EVM. Note that L2 must be installed and R12 remove for the EMI filter to operate. Optional components C3-C6, C9, and R13 can also be installed as required.
    EN Jumper Set EN/UVLO pin options Use this jumper to enable/disable the EVM. The optional resistors connected to this pin, RENT (R1) and RENB (R2), set the input UVLO thresholds. See the LMR36500 data sheet for more details. Note that for accurate shutdown current measurement, these resistors must be removed and the EN input test point grounded.
    PGOOD The PGOOD test point is used to monitor the power-good indicator. This flag indicates whether the output voltage has reached the regulation level. PGOOD is an open-drain output that is tied to VCC through a 100-kΩ, resistor RPU2 (R4). Alternatively, RPU2 can be removed and RPU1 (R3) can be used to tie the PGOOD pull-up to Vout.
    RT The LMR36500EVM is configured for 1-MHz operation by resistor RT_1MHz (R5). Other switching frequencies can be selected by using one of the other RT setting resistors, RTT (R7) or RT_1.1MHz (R6). See the LMR36500 data sheet for details.
GUID-20230911-SS0I-FDSV-LSNS-0PGR9V0VGQ1H-low.svg Figure 2-3 LMR36500EVM Setup